Question

Which of the following is NOT true about mafic minerals?

A. They contain much magnesium and iron.
B. Amphibole is a mafic mineral.
C. They are more common in the oceanic crust.
D. They are generally light colored.
E. They crystallize at higher temperatures than felsic minerals.

Answer 1

Option D.

The statement that mafic minerals are generally light-colored is NOT true; they are typically dark due to high iron and magnesium content.

Step-by-step explanation:

When considering which of the following statements is NOT true about mafic minerals, it's important to understand their characteristics.

Mafic minerals, such as olivine, pyroxene, and amphibole, are indeed rich in magnesium and iron and are commonly found in the oceanic crust.

These minerals are also known for crystallizing at higher temperatures compared to felsic minerals. Yet, the notion that mafic minerals are light-colored is incorrect.

Mafic minerals tend to be darker due to the presence of iron and magnesium components.

The correct answer to the question - Which of the following is NOT true about mafic minerals? - is option D: They are generally light colored.

This statement is false because mafic minerals are typically dark-colored, which indicates that they contain substantial amounts of iron and magnesium.